PMID- 26405995
OWN - NLM
STAT- MEDLINE
DCOM- 20160722
LR  - 20150926
IS  - 1878-3619 (Electronic)
IS  - 0959-2989 (Linking)
VI  - 26 Suppl 1
DP  - 2015
TI  - Comparison of EMG during passive stretching and shortening phases of each muscle 
      for the investigation of parkinsonian rigidity.
PG  - S2155-63
LID - 10.3233/BME-151521 [doi]
AB  - The aim of this study was to test the hypothesis in the literature that torque 
      resistance of parkinsonian rigidity is the difference between the independent 
      contributions of stretched and shortened muscles. The hypothesis was tested using 
      muscle-specific stretch-shortening (MSSS) EMG ratio in this study. Nineteen 
      patients with idiopathic Parkinson's disease (PD) and 18 healthy subjects (the 
      mean age comparable to that of patients) participated in this study. The EMG 
      activity was measured in the four muscles involved in wrist joint movement, i.e. 
      flexor carpi radialis, flexor carpi ulnaris, extensor carpi radialis and extensor 
      carpi ulnaris. The passive flexion-extension movement with a range of +/-30 composite function was 
      applied at wrist joint. Root mean squared (RMS) mean was calculated from the 
      envelope of the EMG for each of stretching and shortening phases. MSSS EMG ratio 
      was defined as the ratio of RMS EMG of stretching phase and RMS EMG of shortening 
      phase of a single muscle, and it was calculated for each muscle. MSSS EMG ratios 
      were smaller than one in all muscles. These results indicate that all wrist 
      muscles generate greater mean EMG during shortening than during stretching. 
      Therefore, the torque resistance of parkinsonian rigidity cannot be explained as 
      the simple summation of independent antagonistic torque pair.
FAU - Kwon, Yuri
AU  - Kwon Y
AD  - School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea.
FAU - Kim, Ji-Won
AU  - Kim JW
AD  - School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea.
FAU - Kim, Ji-Sun
AU  - Kim JS
AD  - School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea.
FAU - Koh, Seong-Beom
AU  - Koh SB
AD  - Department of Neurology, Korea University College of Medicine, Seoul, Korea.
FAU - Eom, Gwang-Moon
AU  - Eom GM
AD  - School of Biomedical Engineering, Konkuk University, Choonju, 380-701, Korea.
AD  - Research Institute of Biomedical Engineering, Konkuk University, Choonju, 
      380-701, Korea.
FAU - Lim, Tae-Hong
AU  - Lim TH
AD  - Department of Biomedical Engineering, University of Iowa, IA, USA.
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Netherlands
TA  - Biomed Mater Eng
JT  - Bio-medical materials and engineering
JID - 9104021
SB  - IM
MH  - Aged
MH  - Electromyography
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Muscle Contraction
MH  - Muscle, Skeletal/*physiopathology
MH  - Parkinson Disease/*physiopathology
MH  - Range of Motion, Articular
MH  - Wrist Joint/*physiopathology
OTO - NOTNLM
OT  - EMG
OT  - parkinsonian rigidity
OT  - passive shortening
OT  - passive stretching
EDAT- 2015/09/26 06:00
MHDA- 2016/07/23 06:00
CRDT- 2015/09/26 06:00
PHST- 2015/09/26 06:00 [entrez]
PHST- 2015/09/26 06:00 [pubmed]
PHST- 2016/07/23 06:00 [medline]
AID - BME1521 [pii]
AID - 10.3233/BME-151521 [doi]
PST - ppublish
SO  - Biomed Mater Eng. 2015;26 Suppl 1:S2155-63. doi: 10.3233/BME-151521.